Cheapest video card to get XBOX 360 quality gameplay on a PC?

I bought ati radeon 4350hd for �30/$37 est from ebuyer for my computer. I too only do light gaming. It has hdmi with audio , vga and dvi and can run my games at res of 1366x768(1080i). I ran need for speed hot pursuit at full on that res just fine. So thats what reccomend for low budget.